Download S2 Sequencer Operating Instructions

S2 EME SEQUENCER TERMINAL ASSIGNMENTS (STANDARD)
Terminal assignments are very important, so take your time when doing the wiring. Damage can be caused to
your Preamp and Power Relays if connections are made incorrectly. The Green (10) position terminal connector
can be removed for ease of wire connections.
TERMINAL 1: +13 VDC to power a Preamp, generally tower or mast mounted. The +13 VDC will
only appear when the Preamp switch has been turned on from the front panel.
TERMINAL 2: This is the Preamp control line. When the sequencer is “Keyed”, this line will put a Preamp in a
NON operating state for Transmit.
TERMINAL 3: Is used for a Transmit / Receive Relay control line. When the sequencer is “Keyed” your supplied
RF coaxial relay will switch to the Transmit State.
TERMINAL 4: This Terminal has been supplied as a customer related output. Connect your PA Bias Control or
other related output to this terminal.
TERMINAL 5: This Terminal has been supplied as a customer related output. Connect your Transverter,
Amplifier or even your Exciter if a foot switch is used.
TERMINAL 6: This Terminal provides an additional +13VDC output that is constant. This can be used
to power other items.
TERMINAL 7: Switched +27 VDC to power a Horizontal / Vertical Polarization relay, generally tower or mast
mounted. The voltage will only appear when the H / V switch has been activated from the front
panel of the Sequencer.
TERMINAL 8: Constant +27 VDC to power a Transmit / Receive Relay generally tower or mast mounted.
TERMINAL 9: This terminal is for the “Test” feature if you are using the M2 Preamp.
TERMINAL 10: This terminal is ground. Connect a ground wire from your grounding system located in your
radio room.
XCVR INPUT: In order for the S2 Sequencer to determine the difference between Transmit or Receive, it is
necessary to supply a “Keyed” state from your Transceiver. We have supplied both a “+2-12VDC”
input and a “To Ground” input. Check your Transceiver manual for the proper connections. These
terminal assignments match our preamps and high power relay boxes. We recommend this
configuration for “Homebrew” switching designs also, but your configuration may vary.